[vyktor@grepfruit tmp]$ g++ src.cpp `pkg-config --libs --cflags opencv` ; ./a.out
[0, 1, 2, 3, 4;
  10, 11, 12, 13, 14;
  20, 21, 42, 23, 24;
  30, 31, 32, 33, 34;
  40, 41, 42, 43, 44]
[0, 1, 2, 3, 4;
  10, 11, 12, 13, 14;
  20, 21, 42, 23, 24;
  30, 31, 32, 33, 34;
  40, 41, 42, 43, 44]